WO2002094573A1 - Ink jet recording medium comprising amine-treated silica - Google Patents

Ink jet recording medium comprising amine-treated silica Download PDF

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Publication number
WO2002094573A1
WO2002094573A1 PCT/US2002/015919 US0215919W WO02094573A1 WO 2002094573 A1 WO2002094573 A1 WO 2002094573A1 US 0215919 W US0215919 W US 0215919W WO 02094573 A1 WO02094573 A1 WO 02094573A1
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Prior art keywords
fumed silica
recording medium
ink jet
silica particles
coating composition
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PCT/US2002/015919
Other languages
French (fr)
Inventor
Michael D. Morris
Michael S. Darsillo
David J. Fluck
Jason R. Hilton
Rudiger Laufhutte
Michael A. Lucarelli
Original Assignee
Cabot Corporation
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Application filed by Cabot Corporation filed Critical Cabot Corporation
Priority to AT02737004T priority Critical patent/ATE309103T1/en
Priority to DE60207236T priority patent/DE60207236T2/en
Priority to JP2002591267A priority patent/JP2004527402A/en
Priority to EP02737004A priority patent/EP1387769B1/en
Publication of WO2002094573A1 publication Critical patent/WO2002094573A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D129/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/02Homopolymers or copolymers of unsaturated alcohols
    • C09D129/04Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B41M5/506Intermediate layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B41M5/508Supports
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • B41M5/5218Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • B41M5/5236Macromolecular coatings characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • B41M5/5245Macromolecular coatings characterised by the use of polymers containing cationic or anionic groups, e.g. mordants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • B41M5/5254Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/52Macromolecular coatings
    • B41M5/529Macromolecular coatings characterised by the use of fluorine- or silicon-containing organic compounds
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Definitions

  • the ink jet recording medium can be prepared utilizing a method comprising coating at least a portion of the surface of a flexible substrate with the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane to provide a coated substrate, and drying the coated substrate to produce an ink jet recording medium.
  • the fumed silica particles used in conjunction with the invention can be of any suitable size.
  • the fumed silica particles have a mean diameter of at least about 100 nm (e.g., particles having a mean diameter of about 100 nm-1 ⁇ m, more preferably about 100-500 nm, most preferably about 100-400 nm, and especially about 150-250 nm).
  • the fumed silica can comprise fumed silica particles having any suitable range of individual particle diameters, such as a relatively broad range or a relatively narrow range.
  • all or substantially all of the primary particles have diameters of less than about 100 nm (e.g., about 1-100 nm), more preferred that all or substantially all of the primary particles have diameters of less than about 50 nm (e.g., about 1-50 nm), even more preferred that all or substantially all of the primary particles have diameters of less than about 30 nm (e.g., about 1-30 nm), and most preferred that all or substantially all of the primary particles have diameters of less than about 20 nm (e.g., about 5-15 nm).
  • the fumed silica can have any suitable surface area.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Ink Jet (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Silicon Compounds (AREA)

Abstract

This invention pertains to an ink jet recording medium comprises a flexible substrate and a coating composition coated on at least one surface of the substrate, wherein the coating composition comprises the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane. The invention also pertains to a method for the preparation of such an ink jet recording medium and to methods for the preparation of a coating composition and a dispersion useful in the preparation of such an ink jet recording medium.

Description

INK JET RECORDING MEDIUM COMPRISING AMINE-TREATED SILICA
FIELD OF THE INVENTION [0001] This invention pertains to an ink jet recording medium comprising a flexible substrate and a coating composition. This invention also pertains to a method for the preparation of an ink jet recording medium and to methods for the preparation of a coating composition and a dispersion useful in the preparation of an ink jet recording medium.
BACKGROUND OF THE INVENTION [0002] To improve the printing properties of a recording medium, a coating composition is sometimes applied to its surface to form a coating thereon. For example, a Coating can impart a superior feel and a photograph-like quality to a printed image; a highly absorptive coating can reduce the smearing and rub off of an image, and a coating that immobilizes (i.e., adsorbs) colorants at the outer surface of the coating can enhance the waterfastness, sharpness, resolution and color density of a printed image. [0003] Coating compositions as described above can be applied to various types of recording media, including those used in ink jet and laser printing processes. In a typical ink jet printing process, a print head scans the recording medium in horizontal strips, using a motor assembly to move it from left to right, as another motor assembly rolls the recording medium vertically through the ink jet printer. As the recording medium is fed vertically through the ink jet printer, ink is emitted from nozzles in vertical rows of pixels to eventually form an image. This differs from, for example, a laser printing process where an image is printed (or copied) onto a recording medium by depositing a uniform electric charge on a photoconductor drum in the dark; exposing the drum to a pattern of light, thereby creating a latent image area; developing the pattern by adding toner particles to the latent image area; transferring toner particles to the recording medium as it is passed over the drum; fusing the toner particles to the recording medium by applying heat and pressure thereto; and cleaning the photoconductor drum.
[0004] There are several advantages of using an ink jet printing process as compared to a laser printing (or copying) process. Indeed, ink jet printing can be done with less expensive hardware and can be used with a variety of different substrates. As a result, the demand for improved ink jet recording media has grown, particularly recording media exhibiting the characteristics described above.
[0005] It is a challenge, however, to prepare an ink jet recording medium having a coating that is at once glossy, absorptive, and immobilizing. Gloss and colorant immobilization can sometimes be achieved by incorporating different types of polymeric resins into a coating composition. For example, gelatin, polyvinyl pyrrolidone and/or polyvinyl alcohol can be used to produce glossiness, while a cationic polymer resin can be used to promote the surface immobilization of an anionic colorant. However, inks applied to polymer-coated ink jet recording media dry relatively slowly, and often have an undesirable tendency to smear and rub off. While some substances such as certain treated kaolin clays or treated calcium carbonates can immobilize colorants, the overall absorptivity and rate of absorption are sometimes compromised with such substances. [0006] Thus, a need remains for an ink jet recording medium having a coating that is at once glossy, absorptive, and immobilizing. The present invention seeks to provide such a recording medium. These and other advantages of the invention will be apparent from the description of the invention provided herein.
BRIEF SUMMARY OF THE INVENTION [0007] The invention provides an ink jet recording medium comprising a flexible substrate and a coating composition coated on at least one surface of the substrate, wherein the coating composition comprises the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane. The invention also provides a method for the preparation of an ink jet recording medium.
[0008] Furthermore, the invention provides a coating composition for ink jet recording media, the composition comprising an aqueous vehicle, at least one binder, and the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane. The invention also provides a method for the preparation of a coating composition and a method for the preparation of a dispersion useful in the preparation of an ink jet recording medium.
DETAILED DESCRIPTION OF THE INVENTION [0009] This invention pertains to an ink jet recording medium comprising a flexible substrate and a coating composition. The invention also pertains to a method for the preparation of an ink jet recording medium and to methods for the preparation of a coating composition and a dispersion useful in the preparation of an ink jet recording medium. [0010] The ink jet recording medium comprises a flexible substrate and a coating composition coated on at least one surface of the substrate, wherein the coating composition comprises the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane. The ink jet recording medium can be prepared utilizing a method comprising coating at least a portion of the surface of a flexible substrate with the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane to provide a coated substrate, and drying the coated substrate to produce an ink jet recording medium.
[0011] In addition, the invention provides a coating composition for ink jet recording media, the composition comprising an aqueous vehicle, at least one binder, and the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane. The coating composition can be prepared utilizing a method comprising combining a dispersion of (a) the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane with (b) at least one binder to produce the coating composition.
[0012] Furthermore, the invention provides a method for the preparation of a dispersion useful in preparing an ink jet recording medium, comprising (a) mixing fumed silica particles with an aqueous vehicle under high shear conditions to form a mixture of fumed silica, such that the mixture does not coagulate and (b) adding at least one aminoorganosiloxane to the mixture of (a), so as to form a dispersion of the product formed from the contact between the fumed silica particles and the at least one aminoorganosiloxane.
[0013] The fumed silica used in conjunction with the invention enhances the ability of the coated flexible substrate to immobilize (i.e., adsorb) and display colorants at the surface of the substrate. The term "colorant" as used herein is meant to encompass both dyes and pigments. In effect, the fumed silica enhances the ability of the coated flexible substrate to immobilize both water-soluble and water insoluble compounds at the surface of the substrate. The fumed silica comprises fumed silica particles that have been contacted with at least one aminoorganosiloxane. Any suitable aminoorganosiloxane can be used in conjunction with the invention. Suitable aminoorganosiloxanes include, for example,
1 1 aminoorganosiloxanes of the formula (R O)nSi(R )m, wherein R is H, a -Cio alkyl, or a metal ion; R2 is an aryl, a Ci-C10 alkyl, or an aralkyl, wherein the aryl, alkyl, and aralkyl are substituted with one or more substituents selected from the group consisting of amines and quaternary ammonium salts; and n and m are each integers equal to or greater than 1, wherein the sum of n and m is 4. Desirably, n is 3 and m is 1, and R2 is an alkyl substituted with one or more substituents selected from the group consisting of amines and quaternary ammonium salts. Therefore, the aminoorganosiloxane used in conjunction with the invention is desirably of the formula (I):
Figure imgf000005_0001
wherein p is an integer from zero to about 100. Preferably, p is an integer from zero to about 50, and more preferably from zero to about 25 (e.g., from zero to about 10, and most preferably either zero or 1). In addition to these preferences, it is desirable for R1 to be H, methyl, or ethyl, and R2 to be substituted with a polyamine. A preferred polyamine is poly(ethyleneimine) or derivatives thereof. In accordance with these preferences, specific aminoorganosiloxanes that are most preferred include 3 -aminopropyltrimethoxysilane, N- (2-aminoethyl)-3 -aminopropyltrimethoxysilane, (3 -triethoxysilylpropyl)-diethylenetriamine, 3 -aminopropyltriethoxysilane, N-(2-aminoethyl)-3 -aminopropyltriethoxysilane, (3 - triethoxysilylpropyl)-diethylenetriamine, and mixtures thereof.
[0014] Advantageously, the ink jet recording medium described herein does not require the ink jet recording medium to contain thermal imaging chemicals. Typically, recording media utilized in applications such as electrophotographic imaging, xerographic imaging, and the like require a heat-sensitive fusible layer containing these thermal imaging chemicals, which are mainly composed of a normally electron donating colorless or slightly colored dye precursor and an electron accepting color developer. The dye precursor and the color developer instantaneously react upon application of heat, such as by a thermal head, thermal pen, laser beam, or the like to form an image. For purposes of the invention, it is suitable for the ink jet recording medium of the invention to be substantially devoid of thermal imaging chemicals. By substantially devoid is meant that the ink jet recording medium of the invention comprises less than about 0.001 wt.% of thermal imaging chemicals. It is also suitable for the ink jet recording medium of the invention to be completely devoid of thermal imaging chemicals. By completely devoid is meant that the ink jet recording medium contains no thermal imaging chemicals. In certain embodiments, however, such as when an Inkjet printer uses heat and/or pressure to form an image, it is suitable for the ink jet recording medium to contain thermal imaging chemicals in an amount such that an image can be successful formed on the ink jet recording medium. [0015] The fumed silica utilized in the invention can be any suitable fumed silica and typically will be in the form of particles that are aggregates of smaller, primary particles. Although the primary particles are not porous, the aggregates contain a significant void volume and are capable of rapidly absorping liquid. These void-containing aggregates enable a coating of such aggregates to retain a significant capacity for liquid absorption even when the aggregate particles are densely packed, which minimizes the inter-particle void volume of the coating.
[0016] The fumed silica particles used in conjunction with the invention can be of any suitable size. Generally, the fumed silica particles have a mean diameter of at least about 100 nm (e.g., particles having a mean diameter of about 100 nm-1 μm, more preferably about 100-500 nm, most preferably about 100-400 nm, and especially about 150-250 nm). The fumed silica can comprise fumed silica particles having any suitable range of individual particle diameters, such as a relatively broad range or a relatively narrow range. Preferably, all or substantially all of the fumed silica particles have diameters of at least about 30 nm (e.g., all or substantially all of the particles have diameters of about 30 nm-1 μm). The particles also can be monodispersed. By monodispersed is meant that the individual particles have diameters that are substantially identical. For example, substantially all monodispersed 200 nm particles have diameters in the range of about 190-210 nm. [0017] It should be noted that the diameter values set forth above for the fumed silica particles refer to the diameters of the aggregates. With respect to the primary particles that make up these silica aggregates, it is preferred that the primary particles have a mean diameter of less than about 100 nm (e.g., about 1-100 nm). More preferably, the primary particles have a mean diameter of less than about 50 nm (e.g., about 1-50 nm), even more preferably less than about 30 nm (e.g., about 1-30 nm), and most preferably less than about 20 nm (e.g., about 5-15 nm). In addition, all or substantially all of the primary particles can have diameters smaller than the mean diameter values set forth above. In other words, it is preferred that all or substantially all of the primary particles have diameters of less than about 100 nm (e.g., about 1-100 nm), more preferred that all or substantially all of the primary particles have diameters of less than about 50 nm (e.g., about 1-50 nm), even more preferred that all or substantially all of the primary particles have diameters of less than about 30 nm (e.g., about 1-30 nm), and most preferred that all or substantially all of the primary particles have diameters of less than about 20 nm (e.g., about 5-15 nm). [0018] Moreover, the fumed silica can have any suitable surface area. Generally a surface area of about 20-400 m2/g is suitable for the fumed silica. Preferably, the fumed silica has a surface area of about 50-400 m2/g, and, more preferably, the fumed silica has a surface area of about 90-330 m2/g, such as about 100-250 m2/g, or even about 150-220 m2/g (e.g., about 180-210 m2/g). The surface area of the fumed silica can be measured by any suitable method known in the art. Typically, the surface area of the fumed silica is determined by the method of S. Brunauer, P.H. Emmet, and I. Teller, J Am. Chemical Society, 60, 309 (1938), which is commonly referred to as the BET method. [0019] The invention involves the use of the product formed from the contact between the fumed silica particles and at least one aminoorganosiloxane. The contact between the fumed silica particles and at least one aminoorganosiloxane can be achieved by any suitable means. For example, an aminoorganosiloxane can be sprayed and optionally heat-treated onto fumed silica particles before being mixed with an aqueous vehicle. It is preferred, however, that the contact between the fumed silica particles and at least one aminoorganosiloxane comprises adding at least one aminoorganosiloxane to the fumed silica particles in a suitable vehicle (e.g., water). The fumed silica particles also can be contacted with at least one aminoorganosiloxane in a suitable solvent (e.g., water). For example, a solution of an aminoorganosiloxane in water can be added to an aqueous mixture of fumed silica particles.
[0020] The product formed from the contact between the fumed silica particles and the at least one aminoorganosiloxane desirably is in the form of a dispersion in a suitable vehicle (for example, a liquid carrier such as water) for subsequent use in preparing the ink jet recording medium. The product particles preferably are stably suspended in the vehicle such that the product particles do not settle to the bottom of a container of the dispersion for at least about 24 hours when the dispersion is allowed to stand (i.e., without stirring or other agitation) at a temperature of about 25 °C following its preparation. [0021] The dispersion of the product can be prepared by any suitable method. Preferably, the dispersion is prepared by a method comprising (a) mixing fumed silica particles with an aqueous vehicle under high shear conditions to form a mixture of fumed silica, such that the mixture does not coagulate, and (b) adding at least one aminoorganosiloxane to the mixture of (a), so as to form a dispersion of the product formed from the contact between the fumed silica particles and the at least one aminoorganosiloxane. Mixing under high shear conditions provides an even distribution of the components of the dispersion, thereby forming a substantially uniform or homogeneous mixture of the components. Mixing under high shear conditions also can improve the rheology of the dispersion and can increase the strength and uniformity of any final article prepared from the dispersion. High shear mixers are described in U.S. Patents 4,225,247, 4,552,463, 4,889,428, 4,944,595, and 5,061,319.
[0022] A dispersion of the product formed from the contact between the fumed silica particles and the at least one aminoorganosiloxane should be relatively stable (i.e., slow to coagulate). The stability of the dispersion can be determined by measuring the viscosity of the dispersion after it is suitably prepared and then allowed to stand undisturbed (i.e., without stirring or any other agitation) for a certain length of time. The viscosity can be measured, for example, using a Brookfield LVT viscometer (spindle no. 5, 60 rpm, two minute spin at 25 °C). Alternatively, the viscosity may be measured pursuant to ASTM D 2196 (06.01) entitled "Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield) Viscometer." It is preferred that the viscosity of the dispersion increases by less than about 50% when the dispersion is allowed to stand at a temperature of about 25 °C for 60 days, 90 days, 180 days, and/or 270 days immediately following the preparation thereof.
[0023] The aqueous vehicle of the dispersion can be any suitable aqueous vehicle (e.g., carrier). The vehicle of the dispersion preferably comprises, consists essentially of, or even consists of water, more preferably deionized water. The vehicle of the dispersion also can comprise any number of suitable water-miscible liquids, such as one or more water-miscible alcohols (e.g., methanol, ethanol, etc.) or ketones (e.g., acetone) in addition to water. [0024] The dispersion comprises fumed silica in an amount of about 5-50% by weight (e.g., about 10-30% by weight). For some end uses, the dispersion preferably has a fumed silica content of at least about 10% by weight (e.g., about 10-50% by weight), more preferably at least about 20% by weight (e.g., about 20%-50% by weight), and most preferably at least about 30% by weight (e.g., about 30-50% by weight). For other end uses, such as when a dispersion of maximum stability is desired, the dispersion preferably comprises less than about 35% by weight of fumed silica (e.g., about 5-35% by weight), more preferably less than about 25% by weight (e.g., about 5-25% by weight), and most preferably less than about 15% by weight (e.g., about 5-15% by weight). [0025] For many end uses, it is desirable for the dispersion to be of high purity. Any suitable technique can be employed for that purpose. One method for increasing purity is to pass the dispersion through a filter (e.g., filtering the dispersion) to remove grit and other impurities and/or to remove particles above a certain size. For example, the dispersion can be filtered such that particles having a diameter of about 1 μm or more are filtered out of the dispersion. In order for a dispersion to be filterable, the viscosity of the dispersion must be low enough such that the dispersion is able to efficiently pass through the desired filter. The finer the filter (i.e., the smaller the size of the pores of the filter), the lower the viscosity of the dispersion must be for the dispersion to efficiently pass through the filter. As will be appreciated by those of ordinary skill in the art, the dispersion should be passed through as fine a filter as possible to achieve as high a degree of purity as possible but without significantly removing the desirable fumed silica particles. Thus, it is generally advantageous to produce a dispersion with a relatively low viscosity, such as described herein, such that the dispersion can be filtered with a suitably fine filter if desired. [0026] While the inventors do not wish to be bound by any particular theory, it is believed that contacting a fumed silica particle with at least one aminoorganosiloxane as described herein causes an aminoorganosiloxane to bind to or to otherwise become associated with the surface of the fumed silica particle, possibly covalently or through an electrostatic interaction. In other words, the interaction of fumed silica particles with an aminoorganosiloxane causes the surface of the fumed silica particles to become cationically charged. Colorants (i.e., dyes and pigments), such as those used in ink jet inks, often contain ionizable functional groups (e.g., SO3H, COOH, PO3H2, etc.), which increase the water solubility of the dyes or dispersibility of the pigments. The colorants become negatively charged when these functional groups ionize in water (e.g., to SO3 ", COO", PO3 2", etc.), and as a result experience strong electrostatic attraction to the positive charge of the fumed silica. Therefore, even though the ink can be rapidly absorbed into the coating via the pores of the fumed silica, the anionic colorants can be separated from the ink, and immobilized near the coating surface.
[0027] The net charge on the fumed silica particles can be qualitatively determined by measuring the zeta potential of the dispersion (e.g., using a Matec MBS 8000 instrument or a Brookhaven Zeta Plus instrument). The magnitude of the zeta potential is proportional to the magnitude of the charge. In addition, negative zeta potential is indicative of a net negative charge on the fumed silica particles, while a positive zeta potential indicates a net positive charge on the fumed silica particles. The dispersion of the product formed from the contact between the fumed silica particles and the at least one aminoorganosiloxane, therefore, desirably exhibits a positive zeta potential.
[0028] The relative ratio of the total amount of aminoorganosiloxane(s) to the total amount of fumed silica must be high enough so that a sufficient amount of the fumed silica particles contact the aminoorganosiloxane(s). Desirably, the fumed silica particles are contacted with at least one aminoorganosiloxane in an amount of about 0.01-5% by weight of the fumed silica. It is preferred, however, that the fumed silica particles are contacted with at least one aminoorganosiloxane in an amount of about 0.05-3% by weight, and most preferably in an amount of about 1-3% by weight, of the fumed silica. [0029] Any suitable flexible substrate can be used in conjunction with the invention. By any suitable flexible substrate is meant that the substrate is characterized by properties, which allow it to be used effectively in an ink jet printing process. Non-flexible substrates, such as those used in conjunction with a xerographic or laser printing processes (e.g., a photoconductor drum), do not exhibit properties which allow them to be used effectively in an ink jet printing process. Moreover, the flexible substrate can be transparent or opaque and can comprise any suitable material (such as a polymer). Examples of such materials include, but are not limited to, polyesters (e.g., poly(ethylene terephthalate)), diacetate resins, triacetate resins, acrylic resins, polycarbonate resins, polyvinyl chloride resins, polyimide resins, cellophane and celluloid, glass sheets, metal sheets, plastic sheets, paper (e.g., cellulose or synthetic paper), photo-base material (e.g., paper coated with polyethylene or baryte), pigment-containing opaque films, and foamed films. Preferably, the flexible substrate comprises a polymer film, cellulose paper, or a photo-base material. When the flexible substrate comprises a polymer film, the polymer film is preferably selected from the group consisting of poly(ethylene terephthalate), polyvinyl chloride, or mixtures thereof. When the flexible substrate comprises a paper, the paper is preferably cellulose paper, and when the flexible substrate comprises a photo-base material, preferably the photo-base material is coated with at least one coating selected from the group consisting of polyethylene, baryte, and mixtures thereof.
[0030] The ink jet recording medium can comprise a flexible substrate having more than one layer of coating, which can be the same or different. However, at least one of the coating layers comprises the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane. For example, the ink jet recording medium of the invention can comprise a flexible substrate coated with one or more ink-receptive layers (e.g., comprising the coating composition described herein) and/or one or more resinous layers (e.g., a glossy, laminated surface layer). Even though the ink jet recording medium of the invention can comprise such additional layers of coating, it has been found that the coating composition of the invention imparts to a substrate sufficient ink absorption, colorant immobilization, and gloss characteristics for the vast majority of printing applications.
[0031] The ink jet recording medium of the invention can be prepared by coating at least a portion of the surface of a flexible substrate by any suitable means with the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane to provide a coated substrate, and drying the coated substrate by any suitable means to produce the recording medium. The product formed from the contact between fumed silica particles and at least one aminoorganosiloxane usually will be part of a coating composition.
[0032] The coating composition of the invention comprises an aqueous vehicle, at least one binder, and the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane. Preferred binders include, but are not limited to, polyvinyl alcohol, polyvinyl acetate, polyvinyl acetal, polyvinyl pyrrolidone, oxidized starch, etherified starch, cellulose derivatives (e.g., carboxymethyl cellulose, hydroxyethyl cellulose, etc.), casein, gelatin, soybean protein, silyl-modified polyvinyl alcohol, conjugated diene copolymer latexes (e.g., maleic anhydride resin, styrene-butadiene copolymer, methyl methacrylate-butadiene copolymers, etc.), acrylic polymer latexes (e.g., polymers and copolymers of acrylic esters and methacrylic esters, polymers and copolymers of acrylic acid and methacrylic acid, etc.), vinyl polymer latexes (e.g., ethylene- vinyl acetate copolymer), functional group-modified polymer latexes obtained by modifying the aforementioned polymers with monomers containing functional groups (e.g., carboxyl groups), aqueous binders such as thermosetting resins (e.g., melamine resin, urea resin, etc.), synthetic resin binders such as polymethyl methacrylate, polyurethane resin, polyester resin (e.g., unsaturated polyester resin), amide resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, and alkyd resin, with polyvinyl alcohol being most preferred. It will be understood that the relative ratio of the total amount of organically treated fumed silica to the total amount of binder(s) will depend on the binder used. For example, the optimum ratio for polyvinyl alcohol will be different from the optimum ratio for polyvinyl pyrrolidone.
[0033] The coating composition can be prepared by any suitable method. Preferably, the coating composition is prepared by combining a dispersion of the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane with at least one binder to produce the coating composition. It will be understood that the pH of the coating composition can be adjusted at any stage during its preparation so as to prevent flocculation and/or coagulation of the coating composition or any component used to produce the coating composition (e.g., a dispersion of fumed silica). For example, the pH can be adjusted during the preparation of the dispersion before mixing the dispersion with the at least one binder. It is also suitable for the pH to be adjusted after the dispersion is mixed with the at least one binder (i.e., after forming the coating composition). In any case, it is preferred that the pH at any stage during the preparation of the coating composition be about 2-6. In certain embodiments, such as when maximum dispersion stability is desired, it is preferred that the pH at any stage during the preparation of the coating composition be about 3-5, more preferably about 3.5-4.5, such as about 3.5-4. The pH can be adjusted using any suitable method, such as via the addition of an acid (e.g., mineral acid, acidic cation exchange resin, etc.) or a base (e.g., an alkali metal hydroxide, basic anion exchange resin, etc.).
[0034] The coating composition can further comprise one or more other additives. Suitable additives can include, for example, cationic surfactants, anionic surfactants (e.g., long-chain alkylbenzene sulfonate salts and long-chain, preferably branched chain, alkylsulfosuccinate esters), nonionic surfactants (e.g., polyalkylene oxide ethers of long- chain, preferably branched-chain, alkyl group-containing phenols, polyalkylene oxide ethers of long-chain alkyl alcohols, and fluorinated surfactants), hardeners (e.g., active halogen compounds, vinylsulfone compounds, aziridine compounds, epoxy compounds, acryloyl compounds, isocyanate compounds, etc.), pigment dispersants, thickeners, flowability improvers, antifoamers (e.g., octyl alcohol, silicone-based antifoamers, etc.), foam inhibitors, releasing agents, foaming agents, penetrants, coloring dyes, coloring pigments, whiteners (e.g., fluorescent whiteners), preservatives (e.g., p-hydroxybenzoate ester compounds, benzisothiazolone compounds, isothiazolone compounds, etc.), antifungal agents, yellowing inhibitors (e.g., sodium hydroxymethanesulfonate, sodium p- toluenesulfinate, etc.), ultraviolet absorbers (e.g., benzotriazole compounds having a hydroxy-dialkylphenyl group at the 2-position), antioxidants (e.g., sterically hindered phenol compounds), antistatic agents, pH regulators (e.g., sodium hydroxide, sodium carbonate, sulfuric acid, hydrochloric acid, phosphoric acid, citric acid, etc.), water-resisting agents, wet strengthening agents, and dry strengthening agents. In addition to these additives, the coating composition also can comprise a mordant. Suitable mordants include, for example, poly(ethyleneimine), poly(vinylbenzyl trimethylammonium chloride), poly(diallyldimethyl ammonium chloride), and mixtures thereof. [0035] Additional particulates can be added to the coating composition, if desired, to further enhance the ability of the ink jet recording medium to immobilize colorants. Such particulates include, for example, calcium carbonate, clays, aluminum silicates, urea- formaldehydes, and the like. Other suitable particulates include alumina (e.g., alumina sols, colloidal alumina, cationic aluminum oxide or hydrates thereof, pseudoboehmite, etc.), magnesium silicate, magnesium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, diatomaceous earth, calcium silicate, aluminum hydroxide, lithopone, zeolite, hydrated halloycite, magnesium hydroxide, polyolefins (e.g., polystyrene, polyethylene, polypropylene, etc.), plastics (e.g., acrylic), urea resin, and melamine resin.
[0036] The coating composition can be applied to the flexible substrate using any suitable method or combination of methods to provide the coated flexible substrate. Suitable methods include, but are not limited to, roll coating, blade coating, air knife coating, rod coating, bar coating, cast coating, gate roll coating, wire bar coating, short- dowel coating, slide hopper coating, curtain coating, flexographic coating, gravure coating, Komma coating, size press coating in the manner of on- or off-machine, and die coating, with rapid, relatively inexpensive methods such as rod coating and blade coating being preferred.
[0037] After application to the flexible substrate, the coating composition can be dried using any suitable method or combination of methods to provide the ink jet recording medium. Suitable drying methods include, but are not limited to, air or convection drying (e.g., linear tunnel drying, arch drying, air-loop drying, sine curve air float drying, etc.), contact or conduction drying, and radiant-energy drying (e.g., infrared drying and microwave drying).
[0038] An image can be recorded on the ink jet recording medium by any suitable method. Suitable methods include those known in the art such as drop on demand methods (e.g., piezo electric or thermal methods) and continuous methods. Preferably, the method comprises a system whereby ink is released from a nozzle and applied to the ink jet recording medium. The ink jet system disclosed in Japanese Patent Document No. 54- 59936, in which an ink rapidly changes volume due to the action of thermal energy and is ejected from a nozzle by the action of this change of state, effectively can be used in conjunction with the ink jet recording medium of the invention.
[0039] The following examples further illustrate the invention but, of course, should not be construed as in any way limiting its scope.
EXAMPLE 1 [0040] This example illustrates the preparation of a dispersion in accordance with the invention.
[0041] A high shear mixer was charged with deionized water (20.2 kg), and hydrochloric acid (36.7 g of 37% concentration). With the mixer running, fumed silica (9.5 kg of 190 m2/g Cab-O-Sil® fumed silica available from Cabot Corporation) was added in sequential amounts and at a constant rate such that the mixture in the aqueous vehicle did not coagulate. After complete addition of the fumed silica, the mixture was further subjected to high shear mixing for an additional 75 minutes. Deionized water (17.9 kg) was then added to the mixer and mixing continued for an additional 15 minutes. While the mixer was running, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (54.2 g) was added and subjected to high shear mixing for 15 minutes so as to produce a dispersion of the product formed from the contact between the fumed silica particles and the aminoorganosiloxane N-(2-aminoethyl)-3 -aminopropyltrimethoxysilane. Hydrochloric acid (6.4 g of 37% concentration) was added to the dispersion in order to reduce the pH. The dispersion was subsequently filtered through a nominal 1 μm bag filter to remove any large particles in the dispersion. The resulting filtrate had the following properties:
pH 3.7
Solids Content (by weight) 20.0 wt. %
Brookfield Viscosoty (spindle 5, 60 rpm) 10 cP Mean Particle Diameter (photon correlation spectroscopy) 124 nm
Zeta Potential +26 mV
[0042] The dispersion thus prepared has excellent stability for long-term shelf life and storage. The dispersion can be used to form a coating composition, which can be used to produce an ink jet recording medium that exhibits good gloss and absorption as well as a superior feel. Moreover, an ink jet recording medium prepared with the coating composition exhibits excellent waterfastness, detailed sharpness, high resolution, and a desirable color density when used in an ink jet printing process.
EXAMPLE 2 [0043] This example illustrates the preparation of an ink j et recording medium of the invention using a coating composition and methods of the invention. [0044] A high shear mixer was charged with deionized water (93 kg) and hydrochloric acid (150 g of 37% concentration). With the mixer running, fumed silica (38.9 g of 200 m2/g Cab-O-Sil® fumed silica available from Cabot Corporation) was added in sequential amounts and at a constant rate such that the mixture in the aqueous vehicle did not coagulate. After complete addition of the fumed silica, the mixture of fumed silica in the aqueous vehicle was further subjected to high shear mixing for an additional hour. Deionized water (57.4 kg) then was added to the mixer, and high shear mixing continued for an additional 10 minutes. While the mixer was running, N-(2-aminoethyl)-3- aminopropyltrimethoxysilane (221 g) was added to the mixer and subjected to high shear mixing for about 15 minutes so as to produce a dispersion of the product formed from the contact between the fumed silica particles and the aminoorganosiloxane N-(2-aminoethyl)- 3-aminopropyltrimethoxysilane. The dispersion was subsequently filtered through a nominal 1 μm bag filter to remove any large particles remaining in the dispersion. The resulting filtrate had the following properties:
pH 4.1
Solids Content (by weight) 21 wt. %
Brookfield Viscosity (spindle 5, 60 rpm) 47 cp
Mean Particle Diameter (photon correlation spectroscopy) 139 nm
Zeta Potential +36 mV
[0045] A 100 g amount of this filtered dispersion was added to a solution of polyvinyl alcohol (11.1 g of 30% concentration Airvol 203, Air Products Inc.) and a 10% solution of a wetting agent (0.8 g Surfactant 10-G, Arch Chemicals, Inc.). This mixture was subjected to mixing for approximately one minute. The mixture then was placed in a vacuum desiccator at ambient temperature (about 20-25 ° C) for about one hour to remove any entrained air bubbles. The resulting coating composition was coated onto transparent poly(ethylene terephthalate) polymer film using a Number 22 Meyer Rod applicator. The resulting coated substrate was dried at 35 °C for about three hours to produce an ink jet recording medium having a coating weight of 10-11 g/m2.
[0046] The ink jet recording medium produced by the invention exhibited good gloss and absorption as well as a superior feel. Moreover, the ink jet recording medium provided printed images with excellent waterfastness, detailed sharpness, high resolution and a desirable color density when used in an ink jet printing process. [0047] All references, including publications, patent applications, and patents, cited herein are hereby incorporated by reference to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein.
[0048] The use of the terms "a" and "an" and "the" and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms "comprising," "having," "including," and "containing" are to be construed as open-ended terms (i.e., meaning "including, but not limited to,") unless otherwise noted. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non- claimed element as essential to the practice of the invention.
[0049] Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Variations of those preferred embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.

Claims

WHAT IS CLAIMED IS:
1. An ink jet recording medium comprising a flexible substrate and a coating composition coated on at least one surface of the substrate, wherein the coating composition comprises the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane.
2. The ink j et recording medium of claim 1 , wherein the aminoorganosiloxane
1 1 9 is of the formula (R O)nSi(R )m, wherein R is H, a Ci-Cio alkyl, or a metal ion; R is an aryl, a Ci-Cio alkyl, or an aralkyl, wherein the aryl, alkyl, and aralkyl are substituted with one or more substituents selected from the group consisting of amines and quaternary ammonium salts; and n and m are each integers equal to or greater than 1, wherein the sum ofn and m is 4.
3. The ink j et recoding medium of claim 2, wherein n is 3 and m is 1.
4. The ink jet recording medium of claim 2 or 3, wherein R is an alkyl substituted with one or more substituents selected from the group consisting of amines and quaternary ammonium salts.
5. The ink j et recording medium of any of claims 1 -4, wherein the aminoorganosiloxane is of the formula:
Figure imgf000017_0001
wherein p is an integer from zero to about 100.
6. The ink jet recording medium of claim 5, wherein p is an integer from zero to about 50.
The ink jet recording medium of claim 6, wherein p is either zero or 1.
8. The ink jet recording medium of any of claims 2-7, wherein R1 is selected from the group consisting of H, methyl, or ethyl.
9. The ink jet recoding medium of any of claims 2-8, wherein R is substituted with a polyamine.
10. The ink jet recording medium of claim 9, wherein the polyamine is poly(ethyleneimine) or derivatives thereof.
11. The ink j et recording medium of any of claims 1-10, wherein the aminoorganosiloxane is selected from the group consisting of 3- aminopropyltrimethoxysilane, N-(2-aminoethyl)-3 -aminopropyltrimethoxysilane, (3 - trimethoxysilylpropyl)-diethylenetriamine, 3 -aminopropyltriethoxysilane, N-(2- aminoethyl)-3-aminopropyltriethoxysilane, (3-triethoxysilylpropyl)-diethylenetriamine, and mixtures thereof.
12. The ink jet recording medium of any of claims 1-11, wherein the flexible substrate comprises a polymer film, cellulose paper, or a photo-base material.
13. The ink jet recording medium of claim 12, wherein the flexible substrate comprises a polymer film selected from the group consisting of a poly(ethylene terephthalate) polymer, polyester, polyvinyl chloride, and mixtures thereof.
14. The ink jet recording medium of claim 12, wherein the substrate comprises a photo-base material coated with at least one coating selected from the group consisting of polyethylene, baryte, and derivatives thereof.
15. The ink jet recording medium of any of claims 1-14, wherein the fumed silica particles have a surface area of about 90-330 m2/g.
16. The ink jet recording medium of claim 15, wherein the fumed silica particles have a surface area of about 150-220 m2/g.
17. The ink jet recording medium of claim 16, wherein the fumed silica particles have a surface area of about 180-210 m /g.
18. A method of preparing an ink jet recording medium, the method comprising coating at least a portion of the surface of a flexible substrate with the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane to provide a coated substrate, and drying the coated substrate to produce an ink jet recording medium.
19. The method of claim 18, wherein the aminoorganosiloxane is of the formula (R1O)nSi(R2)m, wherein R1 is H, a Cι-C10 alkyl, or a metal ion; R2 is an aryl, a Cι-C10 alkyl, or an aralkyl, wherein the aryl, alkyl, and aralkyl are substituted with one or more substituents selected form the group consisting of amines and quaternary ammonium salts; and n and m are each integers equal to or greater than 1, wherein the sum of n and m is 4.
20. The method of claim 18 or 19, wherein the flexible substrate comprises a polymer film, cellulose paper, or a photo-base material.
21. The method of any of claims 18-20, wherein the fumed silica particles have a surface area of about 90-330 m2/g.
22. The method of claim 21 , wherein the fumed silica particles have a surface area of about 150-220 m2/g.
23. The method of claim 22, wherein the fumed silica particles have a surface area of about 180-210 m2/g.
24. A coating composition for ink jet recording media, the composition comprising an aqueous vehicle, at least one binder and the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane.
25. The coating composition of claim 24, wherein the aminoorganosiloxane is of the formula (R1O)nSi(R2)m, wherein R1 is H, a C^C^ alkyl, or a metal ion; R2 is an aryl, a C Cio alkyl, or an aralkyl, wherein the aryl, alkyl, and aralkyl are substituted with one or more substituents selected form the group consisting of amines and quaternary ammonium salts; and n and m are each integers equal to or greater than 1, wherein the sum of n and m is 4.
26. The coating composition of claim 24 or 25, wherein the aqueous vehicle is water.
27. The coating composition of any of claims 24-26, wherein the at least one binder is polyvinyl alcohol.
28. The coating composition of any of claims 24-27, wherein the coating composition further comprises a mordant.
29. The coating composition of claim 28, wherein the mordant is selected from the group consisting of poly(ethyleneimine), poly(vinylbenzyl trimethylammonium chloride), poly(diallyldimethyl ammonium chloride), or a mixture thereof.
30. The coating composition of any of claims 24-29, wherein the coating composition has a pH of about 3.5-4.5.
31. The coating composition of claim 30, wherein the coating composition has a pH of about 3.5-4.
32. The coating composition of any of claims 24-31 , wherein the fumed silica particles have a surface area of about 90-330 m2/g.
33. The coating composition of claim 32, wherein the fumed silica particles have a surface area of about 150-220 m2/g.
34. The coating composition of claim 33, wherein the fumed silica particles have a surface area of about 180-210 m2/g.
35. A method of preparing a coating composition for ink jet recording media, the method comprising combining a dispersion of (a) the product formed from the contact between fumed silica particles and at least one aminoorganosiloxane with (b) at least one binder to produce the coating composition.
36. The method of claim 35, wherein the aminoorganosiloxane is of the formula (R1O)nSi(R2)m, wherein R1 is H, a Ci-Cio alkyl, or a metal ion; R2 is an aryl, an alkyl, or an aralkyl, wherein the aryl, alkyl, and aralkyl are substituted with one or more substituents selected form the group consisting of amines and quaternary ammonium salts; and n and m are each integers equal to or greater than 1, wherein the sum of n and m is 4.
37. The method of claim 35 or 36, wherein the at least one binder is polyvinyl alcohol.
38. The method of any of claims 35-37, wherein the method further comprises combining the fumed silica particles with at least one mordant.
39. The method of claim 38, wherein the at least one mordant is selected from the group consisting of poly(ethyleneimine), poIy(vinylbenzyl trimethylammonium chloride), poly(diallyldimethyl ammonium chloride), and mixtures thereof.
40. The method of any of claims 35-39, wherein the coating composition has a pH of about 3.5-4.5.
41. The method of claim 40, wherein the coating composition has a pH of about
3.5-4.
42. The method of any of claims 35-41, wherein the fumed silica particles have a surface area of about 90-330 m2/g.
43. The method of claim 42, wherein the fumed silica particles have a surface area of about 150-220 m2/g.
44. The method of claim 43, wherein the fumed silica particles have a surface area of about 180-210 m2/g.
45. A method of preparing a dispersion useful in preparing an ink j et recording medium of claim 1, comprising
(a) mixing fumed silica particles with an aqueous vehicle under high shear conditions to form a mixture of fumed silica, such that the mixture does not coagulate, and (b) adding at least one an aminoorganosiloxane to the mixture of (a), so as to form a dispersion of the product formed from the contact between the fumed silica particles and the at least one aminoorganosiloxane.
46. The method of claim 45, wherein the aqueous vehicle is water.
47. The method of claim 45 or 46, wherein the aminoorganosiloxane is of the formula (R1O)nSi(R2)m, wherein R1 is H, a Ci-Cio alkyl, or a metal ion; R2 is an aryl, an alkyl, or an aralkyl, wherein the aryl, alkyl, and aralkyl are substituted with one or more substituents selected form the group consisting of amines and quaternary ammonium salts; and n and m are each integers equal to or greater than 1, wherein the sum of n and m is 4.
48. The method of any of claims 45-47, wherein the method further comprises, after step (b),
(c) filtering the aqueous dispersion to remove from the dispersion particles having a particle size of about 1 μm or more.
49. The method of any of claims 45-48, wherein the dispersion has a pH of about 3.5-4.5.
50. The method of claim 49, wherein the dispersion has a pH of about 3.5-4.
51. The method of any of claims 45-50, wherein the fumed silica particles have a surface area of about 90-330 m2/g.
52. The method of claim 51 , wherein the fumed silica particles have a surface area of about 150-220 m2/g.
53. The method of claim 52, wherein the fumed silica particles have a surface area of about 180-210 m2/g.
PCT/US2002/015919 2001-05-18 2002-05-16 Ink jet recording medium comprising amine-treated silica WO2002094573A1 (en)

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AT02737004T ATE309103T1 (en) 2001-05-18 2002-05-16 INKJET RECORDING MEDIUM CONTAINING AMINE TREATED SILICON DIOXIDE
DE60207236T DE60207236T2 (en) 2001-05-18 2002-05-16 INK RADIATION MEDIUM WITH AMINE-TREATED SILICON DIOXIDE
JP2002591267A JP2004527402A (en) 2001-05-18 2002-05-16 Inkjet recording medium comprising amine-treated silica
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1306395A2 (en) * 2001-10-26 2003-05-02 Fuji Photo Film Co., Ltd. New cationic polymer and inkjet recording sheet
EP1344654A1 (en) * 2002-03-12 2003-09-17 Hewlett-Packard Company Printing substrate comprising a coating of organo silane modified silica
EP1655348A1 (en) 2004-10-13 2006-05-10 ILFORD Imaging Switzerland GmbH Recording sheet for ink jet printing
WO2007019033A1 (en) * 2005-08-04 2007-02-15 Hewlett-Packard Development Company, L.P. Porous inkjet recording material
US7541146B2 (en) * 2002-10-21 2009-06-02 Corning Incorporated Biomolecule retaining material and methods for attaching biomolecules to a surface
US7700169B2 (en) 2005-05-25 2010-04-20 Ilford Imaging Switzerland Gmbh Recording sheet for ink jet printing
US7754297B2 (en) 2002-11-19 2010-07-13 Fujifilm Corporation Ink jet recording sheet
WO2011103939A1 (en) * 2010-02-25 2011-09-01 Evonik Degussa Gmbh Compositions of metal oxides functionalised by oligomer siloxanols and use thereof
US8053043B2 (en) 2006-02-21 2011-11-08 Ilford Imaging Switzerland Gmbh Recording sheet for ink jet printing
US8697204B2 (en) 2008-03-01 2014-04-15 Ilford Imaging Switzerland Gmbh Recording sheet for ink jet printing

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7037553B2 (en) * 2001-08-21 2006-05-02 Konica Corporation Manufacturing process for ink-jet recording medium
US20040059045A1 (en) * 2002-09-25 2004-03-25 3M Innovative Properties Company Water resistant inkjet photo paper
US7148181B2 (en) * 2003-02-25 2006-12-12 Dainippon Ink And Chemicals, Inc. Thermosensitive recording medium
US20050013986A1 (en) * 2003-05-29 2005-01-20 Buechler Troy Raymond Optical brighteners for display panels
US20050008794A1 (en) * 2003-07-10 2005-01-13 Arkwright, Inc. Ink-jet recording media having a microporous coating comprising cationic fumed silica and cationic polyurethane and methods for producing the same
US20070008790A1 (en) * 2004-05-26 2007-01-11 Buechler Troy R Optical brighteners for display panels
US8084107B2 (en) * 2004-10-20 2011-12-27 Hewlett-Packard Development Company, L.P. Ink-jet media with multiple porous media coating layers
WO2006044106A1 (en) * 2004-10-20 2006-04-27 Hewlett-Packard Development Company, L.P. Ink-jet media with multiple porous media coating layers
US7811540B2 (en) * 2004-10-20 2010-10-12 Cabot Corporation Method of preparing hydrophobic silica directly from an aqueous colloidal silica dispersion
FR2881230B1 (en) * 2005-01-25 2007-04-20 Essilor Int METHOD OF COLORING AN OPTICAL LENS COMPRISING A PRIMARY PRINTING, AND TINTED OPTICAL LENS COMPRISING SUCH A PRIMARY PRINTING
CA2643858A1 (en) * 2006-02-28 2007-09-07 Evonik Degussa Corporation Colored paper and substrates coated for enhanced printing performance
US7959992B2 (en) * 2006-07-06 2011-06-14 Hewlett-Packard Development Company, L.P. Porous inkjet recording material comprising a silane coupling agent
US20100208349A1 (en) * 2006-07-28 2010-08-19 Robert Beer Flexible materials for optical applications
EP2066840A1 (en) * 2006-09-26 2009-06-10 Evonik Degussa Corporation Multi-functional paper for enhanced printing performance
US8048497B2 (en) 2007-04-27 2011-11-01 Hewlett-Packard Development Company, L.P. Gloss-enhancing coating for ink-jet media
CN101772738A (en) 2007-06-08 2010-07-07 卡伯特公司 Carbon blacks, toners, and composites and methods of making same
US9132686B2 (en) * 2008-05-27 2015-09-15 Hewlett-Packard Development Company, L.P. Media for use in inkjet printing
US8795818B2 (en) * 2008-12-16 2014-08-05 Hewlett-Packard Development Company, L.P. Liquid toner digitally printable media
KR101799091B1 (en) 2015-01-23 2017-11-17 주식회사 엘지화학 Super absorbent polymer and preparation method thereof
WO2016130158A1 (en) * 2015-02-13 2016-08-18 Hewlett-Packard Development Company, L.P. Pre-treatment composition

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4225247A (en) 1979-03-09 1980-09-30 Harry Hodson Mixing and agitating device
JPS59192589A (en) * 1983-04-18 1984-10-31 Matsushita Electric Ind Co Ltd Ink jet recording paper
US4552463A (en) 1984-03-15 1985-11-12 Harry Hodson Method and apparatus for producing a colloidal mixture
JPS62178384A (en) * 1986-02-03 1987-08-05 Canon Inc Recorded material
US4889428A (en) 1985-07-29 1989-12-26 Concrete Technology Corporation Rotary mill
US4944595A (en) 1988-08-19 1990-07-31 Simon Hodson Apparatus for producing cement building material
US5061319A (en) 1988-08-19 1991-10-29 Concrete Technology Corporation Process for producing cement building material
WO2000001539A1 (en) * 1998-07-01 2000-01-13 Cabot Corporation Coating composition and recording medium
EP0983867A2 (en) * 1998-09-01 2000-03-08 Eastman Kodak Company Ink-jet recording element containing colloidal silica
WO2001005599A1 (en) * 1999-07-14 2001-01-25 Imation Corp. Image receiving element and method of manufacturing the element

Family Cites Families (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343857A (en) 1978-08-23 1982-08-10 Goodyear Aerospace Corporation Coatings for optical systems
USRE30450E (en) 1979-04-02 1980-12-16 J. M. Huber Corporation Surface modified pigments
GB2128764B (en) 1982-08-23 1986-02-19 Canon Kk Electrostatographic developer
JPS6023863A (en) 1983-07-19 1985-02-06 Canon Inc Formation of image
GB8320086D0 (en) 1983-07-26 1983-08-24 Ciba Geigy Ag Spherical fused silica
USRE32889E (en) 1983-08-31 1989-03-14 Loctite Corporation Thixotropic cyanoacrylate compositions
US4522958A (en) 1983-09-06 1985-06-11 Ppg Industries, Inc. High-solids coating composition for improved rheology control containing chemically modified inorganic microparticles
JPS60224580A (en) 1984-04-23 1985-11-08 Mitsubishi Paper Mills Ltd Ink jet recording medium
US4654284A (en) 1985-10-24 1987-03-31 Xerox Corporation Electrostatographic imaging member with anti-curl layer comprising a reaction product of a binder bi-functional coupling agent and crystalline particles
US4626567A (en) 1985-10-25 1986-12-02 Beecham Home Improvement Products Inc. Water-resistant clear and colored acrylic latex sealant
JPH07117773B2 (en) 1987-02-13 1995-12-18 キヤノン株式会社 Method for producing polymerized toner
JPS6419353A (en) 1987-07-15 1989-01-23 Alps Electric Co Ltd Organic photoconductive material
US5246624A (en) 1989-03-21 1993-09-21 Cabot Corporation Aqueous colloidal dispersion of fumed silica, acid and stabilizer
JPH0617476B2 (en) 1990-09-04 1994-03-09 工業技術院長 Organic group-modified silica particles, method for producing the same, and resin composition containing the particles as filler
US5169441A (en) 1990-12-17 1992-12-08 Hercules Incorporated Cationic dispersion and process for cationizing finely divided particulate matter
US5378566A (en) 1992-11-02 1995-01-03 Xerox Corporation Structurally simplified electrophotographic imaging member
EP0687220B1 (en) * 1993-03-02 1997-12-29 Mitsubishi Paper Mills, Ltd. Ink jet recording sheet
US5411787A (en) 1993-10-19 1995-05-02 Minnesota Mining And Manufacturing Company Water based transparent image recording sheet
DE4402370A1 (en) 1994-01-27 1995-08-03 Degussa Silanised, pyrogenically-produced silica
EP0666155B1 (en) * 1994-01-28 1998-04-08 Forestry And Forest Products Research Institute Wood piled with split and disrupted pieces and its manufacturing method and manufacturing apparatus
JPH07276789A (en) * 1994-04-05 1995-10-24 Fuji Photo Film Co Ltd Recording sheet
US5576088A (en) 1994-05-19 1996-11-19 Mitsubishi Paper Mills Limited Ink jet recording sheet and process for its production
DE4419234A1 (en) 1994-06-01 1995-12-07 Wacker Chemie Gmbh Process for the silylation of inorganic oxides
PT725037E (en) 1995-02-04 2001-07-31 Degussa GRANULATED BASED ON PYROGENICALLY PREPARED SILICE DIOXIDE PROCESS FOR PREPARING AND USING
JP3591969B2 (en) 1995-03-15 2004-11-24 キヤノン株式会社 Inkjet recording medium and color inkjet recording method using the same
US5605750A (en) * 1995-12-29 1997-02-25 Eastman Kodak Company Microporous ink-jet recording elements
JP3818689B2 (en) 1996-01-16 2006-09-06 富士写真フイルム株式会社 Aqueous dispersion of core / shell composite particles having colloidal silica as the core and organic polymer as the shell, and method for producing the same
US5693127A (en) 1996-06-21 1997-12-02 Domino Printing Sciences, Plc Inks
US6129785A (en) 1997-06-13 2000-10-10 Consolidated Papers, Inc. Low pH coating composition for ink jet recording medium and method
US5660622A (en) 1996-08-08 1997-08-26 Nikoloff; Koyu P. Coating for ink jet recording sheets
DE29617413U1 (en) * 1996-10-07 1996-11-21 Mekra Lang Gmbh & Co Kg Monitoring device for difficult or invisible zones around motor vehicles
JPH10264521A (en) 1997-03-26 1998-10-06 Mitsubishi Paper Mills Ltd Reversible thermal recording medium
US6001163A (en) 1997-04-17 1999-12-14 Sdc Coatings, Inc. Composition for providing an abrasion resistant coating on a substrate
AU7965698A (en) 1997-06-13 1998-12-30 California Institute Of Technology Porous silica having spatially organized organic functionalities
DE69828963T2 (en) * 1997-10-01 2006-01-26 Medtronic AVE, Inc., Santa Rosa Drug delivery and gene therapy delivery system
JPH11165459A (en) 1997-12-04 1999-06-22 Unitika Chemical Kk Ink jet recording sheet and its manufacture
US6004889A (en) * 1998-04-28 1999-12-21 Kabushiki Kaisya Nippankenkyusyo Composition for antistatic finish
JP2001010202A (en) 1999-04-27 2001-01-16 Asahi Chem Ind Co Ltd Binder composition for ink-jet recording
US6096469A (en) 1999-05-18 2000-08-01 3M Innovative Properties Company Ink receptor media suitable for inkjet printing
US6478861B1 (en) 1999-06-25 2002-11-12 Videojet Technologies Inc. Laser markable coating
US6994834B1 (en) * 1999-09-22 2006-02-07 Nippon Aerosil Co., Ltd. Surface-modified fine silica powder and use thereof
US6551695B2 (en) 2000-01-14 2003-04-22 Mitsubishi Paper Mills, Limited Ink-jet recording material
DE60119799T2 (en) 2000-01-28 2007-04-26 Oji Paper Co., Ltd. Ink jet recording material
CA2398147A1 (en) * 2000-02-08 2001-08-16 3M Innovative Properties Company Ink fixing materials and methods of fixing ink
EP1145862B1 (en) 2000-04-11 2004-03-17 Degussa AG Coating compositions for ink jet media
US20040036394A1 (en) * 2002-08-21 2004-02-26 3M Innovative Properties Company Process for preparing multi-layer proton exchange membranes and membrane electrode assemblies

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4225247A (en) 1979-03-09 1980-09-30 Harry Hodson Mixing and agitating device
JPS59192589A (en) * 1983-04-18 1984-10-31 Matsushita Electric Ind Co Ltd Ink jet recording paper
US4552463A (en) 1984-03-15 1985-11-12 Harry Hodson Method and apparatus for producing a colloidal mixture
US4889428A (en) 1985-07-29 1989-12-26 Concrete Technology Corporation Rotary mill
JPS62178384A (en) * 1986-02-03 1987-08-05 Canon Inc Recorded material
US4944595A (en) 1988-08-19 1990-07-31 Simon Hodson Apparatus for producing cement building material
US5061319A (en) 1988-08-19 1991-10-29 Concrete Technology Corporation Process for producing cement building material
WO2000001539A1 (en) * 1998-07-01 2000-01-13 Cabot Corporation Coating composition and recording medium
EP0983867A2 (en) * 1998-09-01 2000-03-08 Eastman Kodak Company Ink-jet recording element containing colloidal silica
WO2001005599A1 (en) * 1999-07-14 2001-01-25 Imation Corp. Image receiving element and method of manufacturing the element

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 198450, Derwent World Patents Index; Class A82, AN 1984-309109, XP002208201 *
DATABASE WPI Section Ch Week 198737, Derwent World Patents Index; Class A82, AN 1987-259745, XP002208202 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6743850B2 (en) 2001-10-26 2004-06-01 Fuji Photo Film Co., Ltd. Cationic polymer and inkjet recording sheet
EP1306395A3 (en) * 2001-10-26 2003-06-11 Fuji Photo Film Co., Ltd. New cationic polymer and inkjet recording sheet
EP1306395A2 (en) * 2001-10-26 2003-05-02 Fuji Photo Film Co., Ltd. New cationic polymer and inkjet recording sheet
US7449217B2 (en) 2002-03-12 2008-11-11 Hewlett-Packard Development Company, L.P. Chemically-bonded porous coatings that enhance humid fastness and fade fastness performance of ink jet images
EP1344654A1 (en) * 2002-03-12 2003-09-17 Hewlett-Packard Company Printing substrate comprising a coating of organo silane modified silica
US7740920B2 (en) 2002-03-12 2010-06-22 Hewlett-Packard Development, L.P. Chemically-bonded porous coatings that enhance humid fastness and fade fastness performance of ink jet images
US7541146B2 (en) * 2002-10-21 2009-06-02 Corning Incorporated Biomolecule retaining material and methods for attaching biomolecules to a surface
US7754297B2 (en) 2002-11-19 2010-07-13 Fujifilm Corporation Ink jet recording sheet
EP1655348A1 (en) 2004-10-13 2006-05-10 ILFORD Imaging Switzerland GmbH Recording sheet for ink jet printing
US8071185B2 (en) 2004-10-13 2011-12-06 Ilford Imaging Switzerland Gmbh Recording sheet for ink jet printing
US7700169B2 (en) 2005-05-25 2010-04-20 Ilford Imaging Switzerland Gmbh Recording sheet for ink jet printing
WO2007019033A1 (en) * 2005-08-04 2007-02-15 Hewlett-Packard Development Company, L.P. Porous inkjet recording material
US8053043B2 (en) 2006-02-21 2011-11-08 Ilford Imaging Switzerland Gmbh Recording sheet for ink jet printing
US8697204B2 (en) 2008-03-01 2014-04-15 Ilford Imaging Switzerland Gmbh Recording sheet for ink jet printing
WO2011103939A1 (en) * 2010-02-25 2011-09-01 Evonik Degussa Gmbh Compositions of metal oxides functionalised by oligomer siloxanols and use thereof

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